2-Bromo-2-methylpentane , CAS 4283-80-1 and EC 224-287-9 , is a tertiary alkyl bromide also known as tert-hexyl bromide . Its molecular formula is C6H13Br and molecular weight is 165.07 g/mol. Because the brominated carbon is tertiary, reaction behavior commonly reflects ionization, substitution and elimination competition rather than a simple primary-halide SN2 model. Buyers should qualify GC assay, alkene or rearrangement impurities, acidity, water and performance under the intended reaction conditions.
2-Bromo-2-methylpentane CAS 4283-80-1
- CAS: 4283-80-1
- Synonyms: 2-Bromo-2-methylpentane, 2-Methyl-2-bromopentane, tert-Hexyl bromide, 2-Bromo-2-methyl-pentane
- Einecs: 224-287-9
- Molecular Formula: C₆H₁₃Br
- Grade: Confirm identity, assay method, water or residual solvents, product-specific impurities and physical form against the current COA; no end-use grade is assumed.
- Package: State required quantity and destination; confirm the approved container or cylinder, inerting or stabilizer needs, closure or valve, fill quantity, temperature controls and dangerous-goods requirements against the SDS.
Product Description
Identity and physicochemical profile
| Item | Technical guidance |
|---|---|
| Product identity | 2-Bromo-2-methylpentane; tert-hexyl bromide |
| CAS / EC | 4283-80-1 / 224-287-9 |
| Formula / molecular weight | C₆H₁₃Br / 165.07 g/mol |
| Reaction character | Tertiary alkyl bromide with condition-dependent ionization, substitution and elimination behavior |
| Key purchase controls | Identity, GC assay, alkene and rearrangement impurities, acidity or HBr, water, color and residual starting material |
Applications and grade selection
2-Bromo-2-methylpentane may be evaluated in controlled tertiary-alkylation, solvolysis, elimination or mechanistic synthesis work. It should not be presented as a universal SN2 alkylating reagent. Solvent, nucleophile or base, temperature and water content can shift selectivity and impurity formation.
- Set GC assay and limits for alkenes, rearranged species, starting alcohol or hydrocarbon, acidity and water.
- Run the intended reaction at small scale to compare substitution, elimination, conversion and downstream work-up.
- Confirm compatible packaging, temperature control, dangerous-goods classification and delivery conditions.
Storage and handling
Keep the product tightly closed in compatible packaging away from heat, ignition sources, bases, oxidizers and moisture under the conditions stated in the current SDS. Minimize repeated opening and monitor any color or acidity change.
Safety, documentation and procurement
Handle as a flammable, reactive organobromine intermediate using suitable ventilation, bonding or grounding where required, gloves and eye protection. Procurement should define specification, reaction, quantity, packaging, destination and shipping documentation.
FAQ - Technical & Supply Chain
-
Q:
Can 2-Bromo-2-methylpentane be matched by the formula C6H13Br alone?
A: No. C6H13Br covers multiple constitutional isomers. CAS 4283-80-1 identifies the branched structure with bromine on a tertiary carbon, which is not equivalent to other bromomethylpentanes or bromohexanes. Confirm the full name, CAS number, structure and an agreed GC identity method when matching material.
Ordering & Documentation
Key information for document requests, quotations, and supply planning.
Documents
COA, TDS, SDS/MSDS and packing details are available on request.
Quotation
Send the CAS number, grade, quantity, packing preference and destination.
Sample & Supply
Support is available for samples, trial orders, bulk and repeat supply.
Storage & Shipping
Product-specific conditions are confirmed before order.





